Can be used as a proportion ruler and are a key addition to your art design supplies. design, item size: 16 * 4cm Made from stainless steel with satin finish. It is well designed and durable. The action is and it will last a long time, will fit your needs perfectly. It also comes with a case that protects it from damage. The size is perfect and the accuracy is , caliper will accurate from your checking to within a few tenths of a millimeter. The Golden (phi) Ratio 1: 1.618 . It appears many in geometry, art, architecture and other areas. especially useful for human body dimensions. This caliper are also for measuring eyebrow dimensions. These calipers are accurate, are lightweight, and are well made. The caliper has been designed with customers needs in mind. The curved style is comfortable to hold, adjustable, and light weight. It is fully reusable and can be . Color: Silver Material: Stainless steel Package Contents: 1 * caliper Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.